Eatohet drill



(No Model.) s Sheets-Sheet 1.

T. BASS. I

- RATGHBT DRILL.

No. 429,714. Patented June 10,1890.

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(No Model.) 3 Sheets-Sheet 3.

T. BASS.

RATGHET DRILL. No. 429,714. Patented June 10, 1890.

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1 I I 'L Willi/gases: I [raven/tan l UNITED STATES THOMAS BASS, OF LONDON, ENGLAND,

PATENT OFFICE.

RATCHET-DRILL.

SPECIFICATION forming part of Letters Patent No. 429,714, dated June 10, 1890.

Application filed February 18, 1890- Serial No. 340,837. (No model.)

.To all whom it may concern:

Be it known that I, THOMAS BASS, a subject of the Queen of Great Britain, residing at London, England, have invented new and useful Improvements in Ratchet-Braces, of which the following is a specification.

This invention relates to improvements in ratchet-braces of the kind in which a continuous motion is imparted to the drill.

The novel features of the invention will clearly appear from the following description.

To enable my invention to be fully understood, I will describe the same with reference to the accompany drawings, in which Figure 1 is a plan of my improved ratchetbrace, and Fig. 2 a plan partly in section. Fig. 3 is a View looking in the direction of the arrow, Fig. 1.

a is the ratchet-spindle, having at one end a drill-socket b and at the other a centerscrew 0.

(Z is the ratchet-wheel, which is secured to the spindle a, and which is located between the two plates 6 e, which constitute a kind of frame. These plates are secured together, and the plate 2 is provided with an extension f, forming a handle for facilitating the manipulation of the apparatus.

9 is the operating-lever, which is adapted to work upon a pivot h, carried in the plates 6 c. This lever has at its inner end two arms 2' j, which carry pawls k Z, respectively.

on is a plate for holding the pivots of the pawls in place, and n n are springs for maintaining the pawls in contact with the ratchetteeth. \Vith this construction it is obvious that when the lever g is moved in the direction of the arrow, Fig. 2, the arm 2' will be moved toward the ratchet-wheel, the pawl in causing the partial rotation of the said wheel, and that the arm j will be moved in the reverse direction, the pawl Z sliding over the teeth of the ratchet. hen the lever is moved in the reverse direction, the pawl Z will partially rotate the ratchet-wheel, the pawl 76 sliding over the teeth of the said ratchet.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In combination with a handle supporting the spindle and ratchet and having plates between which the operating-handle is pivoted, a lever g, carrying two spring-pawls engaging with the ratchet-teeth and applied to the handle, as set forth.

2. In combination, the part f, supporting the spindle a, the ratchet-wheel mounted on the spindle, and the operating-lever g, having the arms 01 j, provided with spring-pawls 7.: Z, severally engaging with the ratchet-Wheel, the combination being and operatin g substantially, as set forth.

3. In combination, the handle f, its plates 6 e, and the spindle and ratchet supported in such plates, the lever g and its arms 1' j, carried in such plates, the plate m, and springpawls k Z, the combination being and operating as set forth.

THOMAS BASS.

IrVitnesses:

TOM PRUCE, JOHN E. BOUSFIELD, Of the firm of G. F. Redfcrn d2 00.. 4 South Street, Finsbury, London, Patent Agents. 

